linux-kernel - Re: Uhhuh. NMI received for unknown reason 2c on CPU 0.

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Message-ID: <51098397.5040206@suse.cz>
Date:	Wed, 30 Jan 2013 21:33:27 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	Borislav Petkov <bp@...en8.de>,
	Bjorn Helgaas <bhelgaas@...gle.com>, x86@...nel.org,
	lkml <linux-kernel@...r.kernel.org>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Uhhuh. NMI received for unknown reason 2c on CPU 0.

On 01/30/2013 09:00 PM, Borislav Petkov wrote:
> On Wed, Jan 30, 2013 at 08:43:55PM +0100, Jiri Slaby wrote:
>> On 01/30/2013 06:44 PM, Borislav Petkov wrote:
>>> On Wed, Jan 30, 2013 at 10:27:42AM -0700, Bjorn Helgaas wrote:
>>>> You're right, I don't think we're quite ready to merge those patches.
>>>> But if your NMI is easy to reproduce, it might be worth removing
>>>> e1000e altogether to see if it still happens.
>>>
>>> That's the problem - I've seen it only once so far. I'll watch out for
>>> it and do the above when I find a reliable way of reproducing it. Will
>>> keep you posted.
>>
>> It happens here too. Dunno what is the root cause. I *think* that it
>> never happened unless I used ethernet. Other than that I see no pattern.
>>
>> Attaching -C 20 grep of messages over the last half year if there is
>> something that may help somehow.
> 
> Cool, so it happens once a day, not every day, everytime during resume,
> and with e1000e. Can you try Bjorn's suggestion to remove e1000e
> altogether and see if it still happens?

No, e1000e is not to blame at all. I moved e1000e out of /lib/modules
and it still happens.

What is cool is that I have steps to reproduce:
1) boot
2) run the attached script (turn on all possible power savings -- in
fact everything what powertop suggests)
3) suspend to _disk_ (mem is not enough, BIOS apparently has to
interfere here)
4) resume from disk
5) boom

I tried to remove also wireless drivers, no change.

-- 
js
suse labs

View attachment "power" of type "text/plain" (856 bytes)